forked from xuos/xiuos
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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/**
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* @file: test_adc.c
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* @brief: a application of adc function
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* @version: 1.1
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* @author: AIIT XUOS Lab
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* @date: 2022/1/7
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*/
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#include <stdio.h>
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#include <string.h>
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#include <transform.h>
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void test_adc()
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{
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int adc_fd;
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uint8 adc_channel = 0x0;
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uint16 adc_sample, adc_value_decimal = 0;
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float adc_value;
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adc_fd = PrivOpen(ADC_DEV_DRIVER, O_RDWR);
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if (adc_fd < 0) {
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printf("open adc fd error %d\n", adc_fd);
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return;
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}
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struct PrivIoctlCfg ioctl_cfg;
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ioctl_cfg.ioctl_driver_type = ADC_TYPE;
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ioctl_cfg.args = &adc_channel;
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if (0 != PrivIoctl(adc_fd, OPE_CFG, &ioctl_cfg)) {
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printf("ioctl adc fd error %d\n", adc_fd);
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PrivClose(adc_fd);
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return;
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}
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PrivRead(adc_fd, &adc_sample, 2);
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adc_value = (float)adc_sample * (3.3 / 4096);
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adc_value_decimal = (adc_value - (uint16)adc_value) * 1000;
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printf("adc sample %u value integer %u decimal %u\n", adc_sample, (uint16)adc_value, adc_value_decimal);
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PrivClose(adc_fd);
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return;
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}
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SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0)|SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN),
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adc, test_adc, read 3.3 voltage data from adc);
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